NEW,long lasting spring. Special Mercotac conductor provides stable and continous electrical contact. High quality steel spring for the sufficient cable winding. Hard plastic top and iron made durable bottom with carrying handhold. Non-rubbing pottery ring in the cable hole. 20m kevlar reinforced cable with resistant PVC cover. Made according to the FIE specifications. Used on several World Champs,Grand Prixes,World Cups. 3,6 kg